Flare Stack Sizing Calculator

Flare stack sizing calculator to determine the required flare stack height based on radiation at the flare tip.

Hydrocarbon vapor flowrate

kg/hr

Vapor molecular weight

gm/gmole

Flow temperature

0C

Heat of combustion

kJ/kg

Specific heat ratio - Cp/Cv

Wind velocity

m/s

Mach Number in stack

Fraction of heat generation radiated

Stack Diameter

m

Heat generated

kW

Flame length

m

Stack Height

m

The stack height calculation is based on the allowable radiation at a certain horizontal distance from stack. Here the limit that has been considered is 6.3X106 kW/m2 at a distance of 150 feet (45.7m) from the flare stack.